[1] The aquarium is accredited as a museum-equivalent facility under the Museum Act of the Japanese Ministry of Education, Culture, Sports, Science and Technology.

Tokyo Sea Life Park has its origins in the Uonozoki (literally "fish-viewing room"), the first public aquarium in Japan that was opened in 1882.

In 1952, the aquarium started breeding saltwater fish based on the experimental results of filtration equipment.

[1] In commemoration of the 100th anniversary of the Ueno Zoo, a plan was formulated to build the largest aquarium in Japan.

[1] All specimens kept in the Ueno Aquarium, which subsequently closed, were inherited by Tokyo Sea Life Park.

[citation needed] Tokyo Sea Life Park held the world's first successful exhibition of nurseryfish.

The expansion is expected to have a total floor area of about 22,500 square metres, with maintenance costs of 24 to 27 billion yen.

The park was the first aquarium in Japan to successfully hold Pacific bluefin tuna and scalloped hammerhead specimens in long-term captivity.

Tokyo Sea Life Park maintains friendly ties with Monterey Bay Aquarium in regards to kelp exhibition.

This was the longest captivity record for this species, until the park was overtaken by the Sendai Umino-Mori Aquarium.

[6] At Tokyo Sea Life Park, staff work on the conservation and breeding of both Japanese and foreign rare species.

Although the gestation time was unknown, the park speculated the eggs would take six months to hatch, like other Antarctic fish species.

[22][23][24] After consultation with various experts, measures were taken to address animal safety in the tank and prevent future incidents.